What does RAIM stand for?

RAIM stands for Receiver Autonomous Integrity Monitoring. This term refers to a function of satellite navigation systems, particularly GPS, where the receiver is able to monitor the integrity of its navigation signals without the need for additional ground-based reference stations. RAIM ensures that navigational data is accurate and reliable by detecting and excluding erroneous signals.

This is particularly critical in aviation, as pilots rely on precise navigation data for instrument flying. RAIM assists in making sure that the position data provided to the pilot is trustworthy, thus enhancing safety. In the context of this question, understanding what RAIM entails is crucial for any flight instructor teaching instrument operations, as it directly impacts the verification of navigational systems used during flights.